#include<iostream>
#include"stock20.h"


Stock::Stock() {
	company = "no name";
	shares = 0;
	share_val = 0.0;
	total_val = 0.0;
}

Stock::Stock(const std::string & co, long n, double pr) {
	std::cout << "Constructor using " << co << " called\n";
	company = co;
	if (n < 0) {
		std::cout << "Nnmber of shares can't be negative;"
			<< company << " shares set to 0.\n";
		shares = 0;
	}
	else {
		shares = n;
	}
	share_val = pr;
	set_tot();
}

Stock::~Stock() {
	std::cout << "Bye, " << company << "!\n";
}

void Stock::buy(long num, double price) {
	if (num < 0) {
		std::cout << "Number of shares purchased can't be negative." << "Transaction is aborted.\n";
	}
	else {
		shares += num;
		share_val = price;
		set_tot();
	}
}

void Stock::sell(long num, double price) {
	using std::cout;
	if (num < 0) {
		cout << "Number of shares sold can't be negative. " << "Transaction is aborted.\n";
	}
	else if (num > shares) {
		cout << "You can't sell more than you have! " << "Transaction is aborted.\n";
	}
	else {
		shares -= num;
		share_val = price;
		set_tot();
	}
}

void Stock::update(double price) {
	share_val = price;
	set_tot();
}

void Stock::show()const {
	using std::cout;
	using std::ios_base;
	ios_base::fmtflags orig = cout.setf(ios_base::fixed, ios_base::floatfield);
	std::streamsize prec = cout.precision(3);

	cout << "Company: " << company
		<< " Shares: " << shares << '\n'
		<< " Share Price: $" << share_val
		<< " Total Worth: $" << total_val << '\n';
	cout.precision(2);
	cout << " Total Worth: $" << total_val << '\n';

	cout.setf(orig, ios_base::floatfield);
	cout.precision(prec);
}

const Stock & Stock::topval(const Stock & s)const {
	if (s.total_val > total_val)
		return s;
	else
		return *this;
}